247447 has 4 divisors (see below), whose sum is σ = 250096. Its totient is φ = 244800.

The previous prime is 247439. The next prime is 247451. The reversal of 247447 is 744742.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 744742 = 2 ⋅372371.

It is a cyclic number.

It is not a de Polignac number, because 247447 - 2³ = 247439 is a prime.

It is a super-2 number, since 2×247447² = 122460035618, which contains 22 as substring.

It is a Duffinian number.

247447 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1179 + ... + 1372.

It is an arithmetic number, because the mean of its divisors is an integer number (62524).

2²⁴⁷⁴⁴⁷ is an apocalyptic number.

247447 is a deficient number, since it is larger than the sum of its proper divisors (2649).

247447 is an equidigital number, since it uses as much as digits as its factorization.

247447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2648.

The product of its digits is 6272, while the sum is 28.

The square root of 247447 is about 497.4404486971. The cubic root of 247447 is about 62.7808798135.

The spelling of 247447 in words is "two hundred forty-seven thousand, four hundred forty-seven", and thus it is an iban number.